Commit Message

Description of the Change

This is a bugs fixed version:

How to reproduce the bugs:
* Cairo-Dock (without the OpenGL backend, version 2.3.0~1) crashes if we group windows with the same class in a subdock and then we click on the subdock to maximise windows.
* Slowly leave the dock (version 2.3.0~1) with the cursor on the edge of it and the dock will stay zoomed and active.
* Cairo-Dock (version 2.3.0~1 and 2.3.0~2.1) crashes when the musicPlayer applet is in desklet mode and applets are separated from launchers and the music-player is launched at the same time.